Key stat:Eli Manning had five completions for 72 yards, and 51 of those came on a single completion to Hakeem Nicks. Manning, however, on the next play threw a ball that was tipped an intercepted by Donald Butler.

Not in the boxscore: Allen made a tremendous second effort to score his touchdown. He tip-toed on the sideline and dived with the ball extended to swipe the pylon. The play was reviewed and the call upheld. Chargers linebacker Melvin Ingram saw his first action of the season, and on his first play missed a tackle in the backfield. Manning was heavily booed introductions and each time he came onto the field.

Second Quarter

CHARGERS 24, GIANTS 0

Key play: On a tackle by linebacker Reggie Walker, the Chargers forced Giants running back Andre Brown to fumble, and though the play was initially ruled down by contact, replays overturned it. The Chargers got the ball at New York’s 29 and scored a TD five plays later with 24 seconds left in the half.

Key stat: Philip Rivers completed 12 of 16 passes for 177 yards and three TDs for a through-the-roof QB rating of 140.3 for the half.

Not in the boxscore: Rookie Keenan Allen caught two TDs in the first half, giving him five for the season and his first multi-TD game of the year. In the quarter, he also caught his 60th pass of the year, setting a new Chargers rookie record. On the same reception, Allen also left the field with an announced shoulder injury, but he later returned and caught a critical, third-down 4-yard TD pass at the end of the half.

Third quarter

CHARGERS 31, GIANTS 7

Key play: The Chargers traded TDs with the Giants in the quarter, thanks to a big pass interference penalty against New York. Flushed out of the pocket on third down, Philip Rivers threw to the end zone, and when Vincent Brown came back to the ball, he was raked by Giants linebacker Spencer Paysinger. The 36-yard penalty led to a Ryan Mathews TD.

Key stat: Mathews carried the ball 20 times through three quarters, more than in all but two full games for the season.

Not in the boxscore: On the first play of the second half, Rivers fumbled and in the ensuing scramble for the ball (which the Giants got) he took a blow to the head and appeared to injure his neck. He was attended to by trainers on the sideline, but returned for the next series.

Fourth quarter

CHARGERS 34, GIANTS 17

Key play: The play Chargers fans probably enjoyed the most came with Eli Manning back to pass on fourth-and-5 at the San Diego 47. The protective pocket was crushed, and the Chargers had a Manning sandwich, flattening him between Thomas Keiser and Corey Liuget for an 11-yard loss.

Key stat: Ryan Mathews ran a season-high 29 times, including nine carries in the fourth, to help the Chargers burn up the clock.

Not in the boxscore:Danny Woodhead made an amazing catch for a guy who is only 5-feet-8. Rivers threw a pass to the right sideline, and while battling two defenders, Woodhead essentially came down with the rebound, pulling the ball in with one hand for a 39-yard gain. Backup QB Charlie Whitehurst replaced Rivers late in the game; he’s yet to throw a pass in two mop-up appearances.